Add fast seeking support as a patch

clapper_src/player.js

@@ -175,15 +175,7 @@ class ClapperPlayer extends PlayerBase
 
         debug(`${this.seekingMode} seeking to position: ${position}`);
 
-        if(this.seekingMode !== 'fast')
+        super.seek(position);
-            return super.seek(position);
-
-        let pipeline = this.get_pipeline();
-        let flags = Gst.SeekFlags.FLUSH
-            | Gst.SeekFlags.KEY_UNIT
-            | Gst.SeekFlags.SNAP_AFTER;
-
-        pipeline.seek_simple(Gst.Format.TIME, flags, position);
     }
 
     seek_seconds(position)

clapper_src/playerBase.js

@@ -106,7 +106,10 @@ class ClapperPlayerBase extends GstPlayer.Player
 
         let config = this.get_config();
         setOption(config, value);
-        this.set_config(config);
+        let success = this.set_config(config);
+
+        if(!success)
+            debug(`could not change option: ${option}`);
     }
 
     /* FIXME: add in prefs and move to bind_settings() */
@@ -160,10 +163,15 @@ class ClapperPlayerBase extends GstPlayer.Player
             case 'seeking-mode':
                 this.seekingMode = settings.get_string('seeking-mode');
                 switch(this.seekingMode) {
+                    case 'fast':
+                        this.set_config_option('seek_fast', true);
+                        break;
                     case 'accurate':
+                        this.set_config_option('seek_fast', false);
                         this.set_config_option('seek_accurate', true);
                         break;
                     default:
+                        this.set_config_option('seek_fast', false);
                         this.set_config_option('seek_accurate', false);
                         break;
                 }

pkgs/flatpak/gstreamer-1.0/gst-plugins-bad-add-seek-fast-option.patch

@@ -0,0 +1,156 @@
+From 35fcd972398c8efaf7ff389ab7b98f0428b02394 Mon Sep 17 00:00:00 2001
+From: Rafostar <rafostar.github@gmail.com>
+Date: Thu, 5 Nov 2020 15:34:45 +0100
+Subject: [PATCH] player: add seek_fast config option
+
+Add a `seek_fast` player config option as an alternative to currently available normal and accurate options.
+
+The new `seek_fast` option restores playback from next keyframe from requested seek position and takes precedence over `seek_accurate` when both options are enabled.
+Depending on how keyframes are distributed in the video, this can be even over 20x faster than standard seeking on some files (at the expense of being more inaccurate).
+---
+ gst-libs/gst/player/gstplayer.c | 67 ++++++++++++++++++++++++++++-----
+ gst-libs/gst/player/gstplayer.h |  6 +++
+ 2 files changed, 63 insertions(+), 10 deletions(-)
+
+diff --git a/gst-libs/gst/player/gstplayer.c b/gst-libs/gst/player/gstplayer.c
+index 45705c671..cfa9db11e 100644
+--- a/gst-libs/gst/player/gstplayer.c
++++ b/gst-libs/gst/player/gstplayer.c
+@@ -88,6 +88,7 @@ typedef enum
+   CONFIG_QUARK_USER_AGENT = 0,
+   CONFIG_QUARK_POSITION_INTERVAL_UPDATE,
+   CONFIG_QUARK_ACCURATE_SEEK,
++  CONFIG_QUARK_FAST_SEEK,
+ 
+   CONFIG_QUARK_MAX
+ } ConfigQuarkId;
+@@ -96,6 +97,7 @@ static const gchar *_config_quark_strings[] = {
+   "user-agent",
+   "position-interval-update",
+   "accurate-seek",
++  "fast-seek",
+ };
+ 
+ GQuark _config_quark_table[CONFIG_QUARK_MAX];
+@@ -295,6 +297,7 @@ gst_player_init (GstPlayer * self)
+   self->config = gst_structure_new_id (QUARK_CONFIG,
+       CONFIG_QUARK (POSITION_INTERVAL_UPDATE), G_TYPE_UINT, DEFAULT_POSITION_UPDATE_INTERVAL_MS,
+       CONFIG_QUARK (ACCURATE_SEEK), G_TYPE_BOOLEAN, FALSE,
++      CONFIG_QUARK (FAST_SEEK), G_TYPE_BOOLEAN, FALSE,
+       NULL);
+   /* *INDENT-ON* */
+ 
+@@ -3317,7 +3320,6 @@ gst_player_seek_internal_locked (GstPlayer * self)
+   GstStateChangeReturn state_ret;
+   GstEvent *s_event;
+   GstSeekFlags flags = 0;
+-  gboolean accurate = FALSE;
+ 
+   remove_seek_source (self);
+ 
+@@ -3349,12 +3351,10 @@ gst_player_seek_internal_locked (GstPlayer * self)
+ 
+   flags |= GST_SEEK_FLAG_FLUSH;
+ 
+-  accurate = gst_player_config_get_seek_accurate (self->config);
+-
+-  if (accurate) {
++  if (gst_player_config_get_seek_fast (self->config)) {
++    flags |= GST_SEEK_FLAG_KEY_UNIT | GST_SEEK_FLAG_SNAP_AFTER;
++  } else if (gst_player_config_get_seek_accurate (self->config)) {
+     flags |= GST_SEEK_FLAG_ACCURATE;
+-  } else {
+-    flags &= ~GST_SEEK_FLAG_ACCURATE;
+   }
+ 
+   if (rate != 1.0) {
+@@ -4692,6 +4692,53 @@ gst_player_config_get_position_update_interval (const GstStructure * config)
+   return interval;
+ }
+ 
++/**
++ * gst_player_config_set_seek_fast:
++ * @config: a #GstPlayer configuration
++ * @fast: fast seek or not
++ *
++ * Enable or disable fast seeking. When enabled, player will resume playback from
++ * next keyframe from requested seek position. Generally it will be much faster
++ * than default seeking behaviour, but the outcome position might differ greatly
++ * depending on how keyframes are distributed in video (usually up to few seconds).
++ *
++ * If fast and accurate seeking options are disabled, elements will seek as
++ * close as the request position without slowing down seeking too much.
++ *
++ * Fast seeking is disabled by default. This option takes precedence
++ * over accurate seeking option.
++ * Since: 1.20
++ */
++void
++gst_player_config_set_seek_fast (GstStructure * config, gboolean fast)
++{
++  g_return_if_fail (config != NULL);
++
++  gst_structure_id_set (config,
++      CONFIG_QUARK (FAST_SEEK), G_TYPE_BOOLEAN, fast, NULL);
++}
++
++/**
++ * gst_player_config_get_seek_fast:
++ * @config: a #GstPlayer configuration
++ *
++ * Returns: %TRUE if fast seeking is enabled
++ *
++ * Since: 1.20
++ */
++gboolean
++gst_player_config_get_seek_fast (const GstStructure * config)
++{
++  gboolean fast = FALSE;
++
++  g_return_val_if_fail (config != NULL, FALSE);
++
++  gst_structure_id_get (config,
++      CONFIG_QUARK (FAST_SEEK), G_TYPE_BOOLEAN, &fast, NULL);
++
++  return fast;
++}
++
+ /**
+  * gst_player_config_set_seek_accurate:
+  * @config: a #GstPlayer configuration
+@@ -4702,11 +4749,11 @@ gst_player_config_get_position_update_interval (const GstStructure * config)
+  * it will be slower especially for formats that don't have any indexes or
+  * timestamp markers in the stream.
+  *
+- * If accurate seeking is disabled, elements will seek as close as the request
+- * position without slowing down seeking too much.
+- *
+- * Accurate seeking is disabled by default.
++ * If accurate and fast seeking options are disabled, elements will seek as
++ * close as the request position without slowing down seeking too much.
+  *
++ * Accurate seeking is disabled by default. This option is ignored when
++ * fast seeking is enabled.
+  * Since: 1.12
+  */
+ void
+diff --git a/gst-libs/gst/player/gstplayer.h b/gst-libs/gst/player/gstplayer.h
+index e853ed875..4984126ac 100644
+--- a/gst-libs/gst/player/gstplayer.h
++++ b/gst-libs/gst/player/gstplayer.h
+@@ -282,6 +282,12 @@ void           gst_player_config_set_position_update_interval  (GstStructure * c
+ GST_PLAYER_API
+ guint          gst_player_config_get_position_update_interval  (const GstStructure * config);
+ 
++GST_PLAYER_API
++void           gst_player_config_set_seek_fast (GstStructure * config, gboolean fast);
++
++GST_PLAYER_API
++gboolean       gst_player_config_get_seek_fast (const GstStructure * config);
++
+ GST_PLAYER_API
+ void           gst_player_config_set_seek_accurate (GstStructure * config, gboolean accurate);
+ 
+-- 
+2.26.2
+

pkgs/flatpak/gstreamer-1.0/gst-plugins-bad.json

@@ -28,6 +28,10 @@
         {
             "type": "patch",
             "path": "gst-plugins-bad-gstplayer-ref-sink.patch"
+        },
+        {
+            "type": "patch",
+            "path": "gst-plugins-bad-add-seek-fast-option.patch"
         }
     ]
 }